/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  /* === FIRE ELEMENT PALETTE (Mệnh Hỏa – 1994) === */
  --fire-dark:    #0e0305;   /* Very dark wine/charcoal */
  --fire-deep:    #6b1414;   /* Deep crimson */
  --fire-mid:     #b91c1c;   /* Primary red */
  --fire-light:   #ef4444;   /* Bright red */
  --fire-bright:  #f87171;   /* Light red */
  --gold:         #d97706;   /* Amber/gold */
  --gold-light:   #fbbf24;   /* Bright gold */
  --gold-pale:    #fef3c7;   /* Pale gold bg */
  --orange:       #f97316;   /* Orange accent */
  --cream:        #fff8f6;   /* Warm white bg */
  --white:        #ffffff;
  --gray-50:      #fdf6f6;   /* Warm gray */
  --gray-100:     #f5eded;
  --gray-200:     #e8d9d9;
  --gray-400:     #a08080;
  --gray-600:     #5c3c3c;
  --gray-800:     #2c1515;
  --radius:       12px;
  --radius-lg:    20px;
  --shadow-sm:    0 2px 8px rgba(120,0,0,.08);
  --shadow:       0 4px 20px rgba(120,0,0,.14);
  --shadow-lg:    0 12px 40px rgba(120,0,0,.22);
  --transition:   .3s cubic-bezier(.4,0,.2,1);
}

html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Be Vietnam Pro', sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.65;
  overflow-x: hidden;
}
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }

/* ===== GRADIENT TEXT ===== */
.gradient-text {
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 24px; border-radius: 50px; font-weight: 600;
  font-size: .95rem; cursor: pointer; border: 2px solid transparent;
  transition: var(--transition); white-space: nowrap; font-family: inherit;
}
.btn--primary {
  background: linear-gradient(135deg, var(--fire-mid), var(--fire-light));
  color: var(--white); box-shadow: 0 4px 16px rgba(185,28,28,.38);
}
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(185,28,28,.5); }
.btn--outline {
  border-color: rgba(255,255,255,.6); color: var(--white);
}
.btn--outline:hover { background: rgba(255,255,255,.12); border-color: var(--white); }
.btn--outline-white { border-color: rgba(255,255,255,.7); color: var(--white); }
.btn--outline-white:hover { background: rgba(255,255,255,.15); }
.btn--white { background: var(--white); color: var(--fire-mid); font-weight: 700; }
.btn--white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn--lg { padding: 16px 36px; font-size: 1.05rem; }
.btn--sm { padding: 9px 18px; font-size: .85rem; }
.btn--full { width: 100%; justify-content: center; }
.pulse { animation: pulse 2.5s infinite; }
@keyframes pulse {
  0%,100% { box-shadow: 0 4px 16px rgba(185,28,28,.38); }
  50% { box-shadow: 0 4px 30px rgba(185,28,28,.6), 0 0 0 8px rgba(185,28,28,.08); }
}

/* ===== TOPBAR ===== */
.topbar {
  background: var(--fire-dark);
  color: rgba(255,255,255,.8);
  font-size: .82rem; padding: 8px 0;
}
.topbar__inner {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  justify-content: center;
}
.topbar__divider { opacity: .4; }
.topbar__phone { color: var(--gold-light); font-weight: 700; transition: var(--transition); }
.topbar__phone:hover { color: var(--white); }

/* ===== HEADER ===== */
.header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--gray-200);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow); }
.header__inner {
  display: flex; align-items: center; gap: 24px;
  padding-top: 14px; padding-bottom: 14px;
}
.logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; text-decoration: none; }
.logo__img {
  height: 58px;
  width: 58px;
  object-fit: contain;
  display: block;
  flex-shrink: 0;
  border-radius: 12px;
  box-shadow: 0 2px 12px rgba(0,0,0,.10);
  background: white;
  padding: 4px;
}
.logo__img--footer { height: 44px; filter: brightness(0) invert(1); opacity: .9; }
.logo__icon {
  width: 46px; height: 46px; border-radius: 12px;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: white; flex-shrink: 0;
  box-shadow: 0 4px 14px rgba(185,28,28,.35);
}
.logo__text { display: flex; flex-direction: column; gap: 1px; }
.logo__brand { display: block; font-weight: 800; font-size: 1.08rem; color: var(--fire-dark); line-height: 1.2; letter-spacing: -.01em; }
.logo__tagline { display: block; font-size: .68rem; color: var(--gray-500); font-weight: 400; letter-spacing: .01em; }
.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  padding: 8px 14px; border-radius: 8px; font-size: .9rem;
  font-weight: 500; color: var(--gray-600); transition: var(--transition);
}
.nav a:hover { color: var(--fire-mid); background: var(--gray-100); }
.header__cta { margin-left: 8px; }
.hamburger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 4px; margin-left: auto; }
.hamburger span { width: 22px; height: 2.5px; background: var(--gray-800); border-radius: 2px; transition: var(--transition); display: block; }

/* ===== HERO ===== */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden; background: var(--fire-dark);
}
.hero__bg {
  position: absolute; inset: 0;
  background-image: url('https://picsum.photos/seed/hvac-pro/1400/900');
  background-size: cover; background-position: center;
}
.hero__bg::after {
  content: '';
  position: absolute; inset: 0;
  background:
    linear-gradient(160deg, rgba(14,3,5,.92) 0%, rgba(107,20,20,.82) 50%, rgba(14,3,5,.88) 100%),
    radial-gradient(ellipse 70% 60% at 65% 50%, rgba(185,28,28,.35) 0%, transparent 70%);
}
/* animated grid */
.hero__bg::before {
  content: '';
  position: absolute; inset: 0; opacity: .04; z-index: 1;
  background-image:
    linear-gradient(rgba(255,255,255,.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.8) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero__overlay { position: absolute; inset: 0; background: rgba(10,2,3,.15); }
.hero__content {
  position: relative; z-index: 2;
  padding: 100px 24px 80px; max-width: 820px;
}
.hero__badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(217,119,6,.18); border: 1px solid rgba(217,119,6,.35);
  color: var(--gold-light); padding: 6px 16px; border-radius: 50px;
  font-size: .85rem; font-weight: 600; margin-bottom: 24px;
}
.hero__title {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 800; color: var(--white);
  line-height: 1.15; margin-bottom: 20px;
}
.hero__subtitle {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: rgba(255,255,255,.78); margin-bottom: 36px;
  max-width: 600px;
}
.hero__subtitle strong { color: var(--gold-light); }
.hero__actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 56px; }
.hero__stats {
  display: flex; gap: 0; flex-wrap: wrap;
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.12);
  backdrop-filter: blur(8px); border-radius: var(--radius-lg);
  overflow: hidden;
}
.stat {
  flex: 1; min-width: 120px; padding: 20px 24px;
  display: flex; flex-direction: column; align-items: center; text-align: center;
}
.stat__num { font-size: 2rem; font-weight: 800; color: var(--white); line-height: 1; }
.stat__unit { font-size: .85rem; color: var(--gold-light); font-weight: 600; }
.stat__label { font-size: .78rem; color: rgba(255,255,255,.55); margin-top: 4px; }
.stat__divider { width: 1px; background: rgba(255,255,255,.1); flex-shrink: 0; }
.hero__scroll {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%); z-index: 2;
}
.scroll-arrow {
  width: 28px; height: 28px;
  border-right: 2.5px solid rgba(255,255,255,.4);
  border-bottom: 2.5px solid rgba(255,255,255,.4);
  transform: rotate(45deg); animation: scrollBounce 1.6s infinite;
}
@keyframes scrollBounce {
  0%,100% { transform: rotate(45deg) translateY(0); opacity: .6; }
  50% { transform: rotate(45deg) translateY(6px); opacity: 1; }
}

/* ===== TRUST BAR ===== */
.trust-bar {
  background: var(--white); border-bottom: 1px solid var(--gray-200);
  box-shadow: var(--shadow-sm); position: relative; z-index: 3;
}
.trust-bar__inner { display: flex; flex-wrap: wrap; padding: 24px 0; gap: 0; }
.trust-item {
  flex: 1; min-width: 200px;
  display: flex; align-items: center; gap: 14px;
  padding: 16px 24px; position: relative;
}
.trust-item + .trust-item::before {
  content: ''; position: absolute; left: 0; top: 20%; height: 60%;
  width: 1px; background: var(--gray-200);
}
.trust-item__icon { font-size: 1.8rem; flex-shrink: 0; }
.trust-item strong { display: block; font-size: .9rem; font-weight: 700; color: var(--gray-800); }
.trust-item span { font-size: .8rem; color: var(--gray-600); }

/* ===== SECTIONS ===== */
.section { padding: 96px 0; }
.section-header { text-align: center; margin-bottom: 64px; }
.section-badge {
  display: inline-block;
  background: linear-gradient(135deg, rgba(185,28,28,.1), rgba(249,115,22,.1));
  color: var(--fire-mid); border: 1px solid rgba(185,28,28,.2);
  padding: 6px 18px; border-radius: 50px;
  font-size: .82rem; font-weight: 700; letter-spacing: .05em; text-transform: uppercase;
  margin-bottom: 16px;
}
.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; color: var(--gray-800); line-height: 1.25; margin-bottom: 16px;
}
.section-desc { font-size: 1rem; color: var(--gray-600); max-width: 560px; margin: 0 auto; }

/* ===== SERVICES ===== */
.services { background: var(--cream); }
.services__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 24px;
}
.service-card {
  background: var(--white); border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  border: 1px solid var(--gray-200);
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.service-card__img-wrap { position: relative; overflow: hidden; }
.service-card__img {
  height: 200px; overflow: hidden; position: relative;
}
.service-card__img img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.service-card:hover .service-card__img img { transform: scale(1.06); }
.service-card__img-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(14,3,5,.7) 0%, transparent 60%);
}
.service-card__emoji-big {
  position: absolute; bottom: 14px; left: 18px;
  font-size: 2.2rem; filter: drop-shadow(0 2px 6px rgba(0,0,0,.5));
  z-index: 1;
}
.service-card__badge {
  position: absolute; top: 14px; right: 14px; z-index: 2;
  background: var(--gold); color: var(--white);
  font-size: .72rem; font-weight: 700; padding: 4px 10px; border-radius: 50px;
}
.service-card__body { padding: 22px 24px; }
.service-card__body h3 { font-size: 1.15rem; font-weight: 700; margin-bottom: 12px; color: var(--gray-800); }
.service-card__body ul { margin-bottom: 20px; display: flex; flex-direction: column; gap: 7px; }
.service-card__body li {
  font-size: .88rem; color: var(--gray-600); padding-left: 18px; position: relative;
}
.service-card__body li::before {
  content: '✓'; position: absolute; left: 0;
  color: var(--fire-mid); font-weight: 700;
}

/* ===== PROCESS SECTION ===== */
.process { background: var(--white); }
.process__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 0;
  position: relative;
}
.process__grid::before {
  content: '';
  position: absolute; top: 40px; left: calc(12.5% + 20px); right: calc(12.5% + 20px);
  height: 2px;
  background: linear-gradient(90deg, var(--fire-mid), var(--orange));
  z-index: 0;
}
.process-step { text-align: center; padding: 0 20px; position: relative; z-index: 1; }
.process-step__num {
  width: 80px; height: 80px; border-radius: 50%; margin: 0 auto 20px;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; font-weight: 900; color: white;
  box-shadow: 0 6px 24px rgba(185,28,28,.35);
  position: relative;
}
.process-step__icon { font-size: 2rem; margin-bottom: 12px; }
.process-step h4 { font-size: 1rem; font-weight: 700; color: var(--gray-800); margin-bottom: 8px; }
.process-step p { font-size: .85rem; color: var(--gray-600); line-height: 1.6; }

/* ===== GALLERY ===== */
/* ===== PARTNERS MARQUEE ===== */
@keyframes marqueeLeft {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}
@keyframes marqueeRight {
  0%   { transform: translateX(-50%); }
  100% { transform: translateX(0); }
}

.partners { background: var(--white); padding-bottom: 64px; }
.partners .section-header { padding-bottom: 12px; }

.partners-marquee {
  overflow: hidden;
  padding: 12px 0;
  position: relative;
  /* fade edges */
  -webkit-mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%, transparent 100%);
  mask-image: linear-gradient(to right, transparent 0%, black 8%, black 92%, transparent 100%);
}
.partners-marquee--reverse { margin-top: 16px; }
.partners-marquee:hover .partners-track { animation-play-state: paused; }

.partners-track {
  display: flex;
  gap: 16px;
  width: max-content;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}
.partners-track--left  { animation: marqueeLeft 35s linear infinite; }
.partners-track--right { animation: marqueeRight 38s linear infinite; }

.partner-logo {
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  flex-shrink: 0; width: 170px;
  cursor: default;
  transition: transform .25s ease, filter .25s ease;
  filter: grayscale(30%) opacity(0.85);
}
.partner-logo:hover { transform: translateY(-4px) scale(1.04); filter: grayscale(0%) opacity(1); }
.partner-logo svg { width: 170px; height: 70px; border-radius: 10px; box-shadow: 0 2px 12px rgba(0,0,0,.08); }
.partner-logo span {
  font-size: .72rem; font-weight: 500; color: var(--gray-400);
  white-space: nowrap; letter-spacing: .02em;
}
.partner-logo--dark svg { box-shadow: 0 2px 12px rgba(0,0,0,.3); }
.partner-logo--dark span { color: var(--gray-500); }

/* Stats bar below logos */
.partners__stats {
  display: flex; align-items: center; justify-content: center;
  gap: 0; margin-top: 48px; flex-wrap: wrap;
  background: var(--cream); border-radius: var(--radius-lg);
  padding: 28px 40px; border: 1px solid var(--gray-200);
}
.pstat { display: flex; flex-direction: column; align-items: center; gap: 4px; padding: 0 36px; }
.pstat__num {
  font-size: 2rem; font-weight: 900;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1;
}
.pstat__label { font-size: .82rem; color: var(--gray-500); font-weight: 500; text-align: center; }
.pstat__divider { width: 1px; height: 48px; background: var(--gray-200); flex-shrink: 0; }

/* ===== WHY US ===== */
.why-us { background: var(--cream); }
.why-us__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 24px;
}
.why-card {
  padding: 32px 28px; border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200); position: relative;
  overflow: hidden; transition: var(--transition); background: var(--white);
}
.why-card:hover { border-color: var(--fire-light); box-shadow: 0 8px 32px rgba(185,28,28,.14); transform: translateY(-4px); }
.why-card::before {
  content: '';
  position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: linear-gradient(90deg, var(--fire-mid), var(--orange));
  opacity: 0; transition: var(--transition);
}
.why-card:hover::before { opacity: 1; }
.why-card__num {
  position: absolute; top: 20px; right: 20px;
  font-size: 3.5rem; font-weight: 900; color: var(--gray-100);
  line-height: 1; user-select: none;
}
.why-card__icon { font-size: 2.2rem; margin-bottom: 16px; }
.why-card h4 { font-size: 1.1rem; font-weight: 700; color: var(--gray-800); margin-bottom: 10px; }
.why-card p { font-size: .9rem; color: var(--gray-600); line-height: 1.7; }

/* ===== PRICING ===== */
.pricing { background: var(--white); }
.pricing__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px; margin-bottom: 32px; align-items: start;
}
.pricing-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200); padding: 32px 28px;
  transition: var(--transition); position: relative; overflow: hidden;
}
.pricing-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.pricing-card--featured {
  background: linear-gradient(150deg, var(--fire-dark) 0%, var(--fire-deep) 100%);
  border-color: transparent; color: white; transform: scale(1.03);
}
.pricing-card--featured:hover { transform: scale(1.03) translateY(-4px); }
.pricing-card__ribbon {
  position: absolute; top: 18px; right: -26px;
  background: var(--gold); color: white;
  font-size: .72rem; font-weight: 800; padding: 5px 36px;
  transform: rotate(40deg); letter-spacing: .04em;
}
.pricing-card__header { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.pricing-card__icon { font-size: 2rem; }
.pricing-card__header h3 { font-size: 1.05rem; font-weight: 700; line-height: 1.3; }
.pricing-card--featured .pricing-card__header h3 { color: white; }
.pricing-card__price { margin-bottom: 20px; }
.price-amount {
  font-size: 2rem; font-weight: 800;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.pricing-card--featured .price-amount {
  background: linear-gradient(135deg, var(--gold-light), #fde68a);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.price-amount small { font-size: 1.2rem; }
.price-unit { font-size: .9rem; color: var(--gray-600); margin-left: 4px; }
.pricing-card--featured .price-unit { color: rgba(255,255,255,.65); }
.pricing-card__list { margin-bottom: 24px; display: flex; flex-direction: column; gap: 10px; }
.pricing-card__list li { font-size: .88rem; color: var(--gray-600); }
.pricing-card--featured .pricing-card__list li { color: rgba(255,255,255,.8); }
.pricing__note {
  display: flex; align-items: center; gap: 16px;
  background: linear-gradient(135deg, rgba(185,28,28,.06), rgba(249,115,22,.06));
  border: 1px solid rgba(185,28,28,.15); border-radius: var(--radius-lg);
  padding: 20px 28px; flex-wrap: wrap;
}
.pricing__note span { font-size: 1.5rem; flex-shrink: 0; }
.pricing__note p { flex: 1; font-size: .92rem; color: var(--gray-700); }
.pricing__note p strong { color: var(--fire-mid); }

/* ===== TESTIMONIALS ===== */
.testimonials { background: var(--cream); }
.testimonials__grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px;
}
.testimonial-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 32px 28px; border: 1px solid var(--gray-200); transition: var(--transition);
}
.testimonial-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--fire-light); }
.testimonial-card__stars { color: var(--gold); font-size: 1.1rem; margin-bottom: 16px; letter-spacing: 2px; }
.testimonial-card p {
  font-size: .92rem; color: var(--gray-600); line-height: 1.75;
  margin-bottom: 20px; font-style: italic;
}
.testimonial-card p::before { content: '"'; }
.testimonial-card p::after { content: '"'; }
.testimonial-card__author { display: flex; align-items: center; gap: 12px; }
.author-avatar {
  width: 44px; height: 44px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; font-size: 1rem;
}
.testimonial-card__author strong { display: block; font-size: .9rem; font-weight: 700; color: var(--gray-800); }
.testimonial-card__author span { font-size: .8rem; color: var(--gray-400); }

/* ===== CTA SECTION ===== */
.cta-section {
  position: relative; overflow: hidden;
  background: linear-gradient(150deg, var(--fire-dark) 0%, var(--fire-deep) 100%);
  padding: 96px 0;
}
.cta-section__bg {
  position: absolute; inset: 0;
  background-image: url('https://picsum.photos/seed/technician-work/1200/600');
  background-size: cover; background-position: center; opacity: .12;
}
.cta-section__bg::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 80% 50%, rgba(249,115,22,.2) 0%, transparent 70%);
}
.cta-section__content { position: relative; z-index: 1; text-align: center; }
.cta-section h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800; color: var(--white); margin-bottom: 16px; line-height: 1.25;
}
.cta-section h2 span { color: var(--gold-light); }
.cta-section p { color: rgba(255,255,255,.75); font-size: 1.05rem; margin-bottom: 36px; }
.cta-section__actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }

/* ===== CONTACT ===== */
.contact { background: var(--white); }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }
.contact__info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 16px; align-items: flex-start; }
.contact-item__icon {
  font-size: 1.4rem; width: 48px; height: 48px; flex-shrink: 0;
  background: linear-gradient(135deg, rgba(185,28,28,.1), rgba(249,115,22,.1));
  border-radius: 12px; display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(185,28,28,.15);
}
.contact-item strong { display: block; font-size: .85rem; font-weight: 700; color: var(--gray-800); margin-bottom: 2px; }
.contact-item span, .contact-item a { font-size: .95rem; color: var(--gray-600); }
.contact-item a { color: var(--fire-mid); font-weight: 600; }
.contact-item a:hover { text-decoration: underline; }
.service-areas { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 8px; }
.service-areas span {
  background: var(--cream); border: 1px solid var(--gray-200);
  padding: 4px 12px; border-radius: 50px; font-size: .78rem; color: var(--gray-600);
}
.contact__map iframe { width: 100%; border-radius: var(--radius-lg); box-shadow: var(--shadow); }

/* ===== FOOTER ===== */
.footer { background: var(--fire-dark); color: rgba(255,255,255,.75); padding: 80px 0 0; }
.footer__inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px; padding-bottom: 60px;
}
.footer__brand .logo__brand { color: white; }
.footer__brand .logo__tagline { color: rgba(255,255,255,.45); }
.footer__brand p { margin-top: 16px; font-size: .88rem; color: rgba(255,255,255,.55); line-height: 1.7; }
.footer__links h4, .footer__contact h4 {
  font-size: .85rem; font-weight: 700; color: var(--white);
  text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px;
}
.footer__links ul { display: flex; flex-direction: column; gap: 10px; }
.footer__links a { font-size: .88rem; color: rgba(255,255,255,.55); transition: var(--transition); }
.footer__links a:hover { color: var(--gold-light); }
.footer__phone {
  display: block; font-size: 1.4rem; font-weight: 800;
  color: var(--gold-light); margin-bottom: 6px;
}
.footer__contact p { font-size: .88rem; color: rgba(255,255,255,.55); margin-bottom: 4px; }
.footer__social { display: flex; gap: 10px; margin-top: 16px; }
.social-btn {
  padding: 8px 18px; border-radius: 50px; font-size: .82rem;
  font-weight: 700; border: 1px solid rgba(255,255,255,.2);
  color: rgba(255,255,255,.7); transition: var(--transition);
}
.social-btn:hover { background: rgba(255,255,255,.1); color: var(--white); border-color: rgba(255,255,255,.4); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 20px 0; }
.footer__bottom p { font-size: .82rem; color: rgba(255,255,255,.35); text-align: center; }

/* ===== FLOAT CTA ===== */
.float-cta {
  position: fixed; bottom: 80px; right: 24px;
  z-index: 200; display: flex; flex-direction: column; gap: 12px;
}
.float-btn {
  width: 52px; height: 52px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-lg); transition: var(--transition);
  color: white; cursor: pointer;
}
.float-btn:hover { transform: scale(1.12); }
.float-btn svg { width: 22px; height: 22px; }
.float-btn--call {
  background: linear-gradient(135deg, #22c55e, #16a34a);
  animation: ringPulse 2s infinite;
}
.float-btn--zalo { background: linear-gradient(135deg, #0068ff, #0052cc); }
@keyframes ringPulse {
  0%,100% { box-shadow: 0 4px 20px rgba(34,197,94,.4); }
  50% { box-shadow: 0 4px 30px rgba(34,197,94,.6), 0 0 0 10px rgba(34,197,94,.1); }
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed; bottom: 24px; right: 24px; z-index: 200;
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--fire-mid); color: white; border: none;
  font-size: 1.1rem; cursor: pointer; box-shadow: var(--shadow);
  opacity: 0; pointer-events: none; transition: var(--transition);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; }
.back-to-top:hover { background: var(--fire-deep); transform: translateY(-3px); }

/* ===== PROMO COMBOS ===== */
.promo-combos {
  background: linear-gradient(160deg, var(--fire-dark) 0%, #1a0608 100%);
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.promo-combos::before {
  content: '';
  position: absolute; inset: 0; opacity: .03;
  background-image:
    linear-gradient(rgba(255,255,255,.8) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.8) 1px, transparent 1px);
  background-size: 50px 50px;
}
.promo-combos__header {
  display: flex; align-items: center; gap: 20px;
  margin-bottom: 44px; flex-wrap: wrap;
}
.promo-combos__fire { font-size: 2.8rem; animation: fireFlicker 1.2s ease-in-out infinite alternate; flex-shrink: 0; }
@keyframes fireFlicker {
  0%   { transform: scale(1) rotate(-3deg); filter: brightness(1); }
  100% { transform: scale(1.1) rotate(3deg); filter: brightness(1.3); }
}
.promo-combos__header h2 { font-size: clamp(1.5rem, 3vw, 2.2rem); color: var(--white); font-weight: 800; }
.promo-combos__header p { color: rgba(255,255,255,.65); margin-top: 4px; }
.promo-combos__header p strong { color: var(--gold-light); }
.promo-combos__badge {
  margin-left: auto; background: var(--gold);
  color: white; font-size: .78rem; font-weight: 800;
  padding: 6px 16px; border-radius: 50px;
  animation: pulse 2s infinite; flex-shrink: 0;
}
.promo-combos__grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.promo-card {
  background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg); padding: 28px 24px;
  backdrop-filter: blur(8px); position: relative; overflow: hidden;
  transition: var(--transition); color: var(--white);
}
.promo-card:hover { transform: translateY(-6px); border-color: rgba(239,68,68,.4); box-shadow: 0 16px 48px rgba(185,28,28,.3); }
.promo-card--hot {
  background: linear-gradient(150deg, rgba(185,28,28,.35), rgba(234,88,12,.25));
  border-color: rgba(239,68,68,.35);
  box-shadow: 0 8px 32px rgba(185,28,28,.25);
}
.promo-card__tag {
  display: inline-block; font-size: .72rem; font-weight: 800;
  padding: 4px 12px; border-radius: 50px; margin-bottom: 16px;
  background: rgba(217,119,6,.3); border: 1px solid rgba(217,119,6,.4);
  color: var(--gold-light); letter-spacing: .04em;
}
.promo-card__tag--hot { background: rgba(185,28,28,.5); border-color: rgba(239,68,68,.5); color: #fca5a5; }
.promo-card__tag--office { background: rgba(6,182,212,.2); border-color: rgba(6,182,212,.3); color: #67e8f9; }
.promo-card__icon { font-size: 2rem; margin-bottom: 10px; }
.promo-card h3 { font-size: 1.1rem; font-weight: 800; margin-bottom: 4px; }
.promo-card__desc { font-size: .85rem; color: rgba(255,255,255,.55); margin-bottom: 16px; }
.promo-card__price { margin-bottom: 6px; }
.promo-card__old {
  display: block; font-size: .85rem; color: rgba(255,255,255,.4);
  text-decoration: line-through; margin-bottom: 2px;
}
.promo-card__new {
  font-size: 2rem; font-weight: 900;
  background: linear-gradient(135deg, var(--gold-light), var(--orange));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  line-height: 1;
}
.promo-card__new sup { font-size: 1rem; }
.promo-card__save {
  display: inline-block; font-size: .78rem; font-weight: 700;
  color: #86efac; background: rgba(34,197,94,.15);
  border: 1px solid rgba(34,197,94,.25);
  padding: 3px 10px; border-radius: 50px; margin-bottom: 18px;
}
.promo-card ul { margin-bottom: 20px; display: flex; flex-direction: column; gap: 8px; }
.promo-card li { font-size: .86rem; color: rgba(255,255,255,.75); padding-left: 4px; }
.promo-combos__note {
  display: flex; align-items: center; gap: 14px;
  margin-top: 28px; background: rgba(217,119,6,.12);
  border: 1px solid rgba(217,119,6,.25); border-radius: var(--radius);
  padding: 16px 24px; flex-wrap: wrap; color: rgba(255,255,255,.75);
}
.promo-combos__note span { font-size: 1.4rem; }
.promo-combos__note p { flex: 1; font-size: .9rem; }
.promo-combos__note strong { color: var(--gold-light); }

/* ===== PRICE TABS ===== */
.price-tabs {
  display: flex; gap: 8px; flex-wrap: wrap;
  margin-bottom: 28px; justify-content: center;
}
.price-tab {
  padding: 10px 22px; border-radius: 50px; border: 2px solid var(--gray-200);
  background: var(--white); font-size: .88rem; font-weight: 600;
  cursor: pointer; font-family: inherit; color: var(--gray-600);
  transition: var(--transition);
}
.price-tab:hover { border-color: var(--fire-light); color: var(--fire-mid); }
.price-tab.active {
  background: linear-gradient(135deg, var(--fire-mid), var(--fire-light));
  border-color: transparent; color: white;
  box-shadow: 0 4px 16px rgba(185,28,28,.3);
}
.price-table-wrap { display: none; overflow-x: auto; }
.price-table-wrap.active { display: block; }
.price-table {
  width: 100%; border-collapse: collapse;
  border-radius: var(--radius); overflow: hidden;
  box-shadow: var(--shadow);
}
.price-table thead tr {
  background: linear-gradient(135deg, var(--fire-mid), var(--fire-light));
  color: white;
}
.price-table th { padding: 14px 20px; text-align: left; font-size: .88rem; font-weight: 700; }
.price-table td { padding: 13px 20px; font-size: .88rem; border-bottom: 1px solid var(--gray-100); color: var(--gray-700); }
.price-table tbody tr:last-child td { border-bottom: none; }
.price-table tbody tr:nth-child(even) { background: var(--gray-50); }
.price-table tbody tr:hover { background: rgba(185,28,28,.04); }
.price-table tr.highlight { background: rgba(185,28,28,.06) !important; }
.price-table tr.highlight td { font-weight: 600; color: var(--gray-800); }
.price-val { font-weight: 700; color: var(--fire-mid); white-space: nowrap; }

/* ===== TROUBLESHOOT ===== */
.troubleshoot { background: var(--cream); }
.ts-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px;
}
.ts-card {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--gray-200); overflow: hidden;
  box-shadow: var(--shadow-sm); transition: box-shadow var(--transition);
}
.ts-card:hover { box-shadow: var(--shadow); }
.ts-card__header {
  display: flex; align-items: center; gap: 14px;
  padding: 20px 24px; cursor: pointer;
  transition: background var(--transition);
  user-select: none;
}
.ts-card__header:hover { background: var(--gray-50); }
.ts-card__icon { font-size: 1.6rem; flex-shrink: 0; }
.ts-card__header h3 { font-size: 1rem; font-weight: 700; color: var(--gray-800); flex: 1; }
.ts-card__arrow {
  font-size: .75rem; color: var(--gray-400); flex-shrink: 0;
  transition: transform .3s ease;
}
.ts-card__header.open .ts-card__arrow { transform: rotate(180deg); }
.ts-card__body {
  display: none; padding: 0 24px 24px;
  border-top: 1px solid var(--gray-100);
}
.ts-card__body.open { display: block; }
.ts-step {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 14px 0; border-bottom: 1px solid var(--gray-100);
}
.ts-step:last-of-type { border-bottom: none; }
.ts-step__num {
  width: 28px; height: 28px; border-radius: 50%; flex-shrink: 0;
  background: linear-gradient(135deg, var(--fire-mid), var(--orange));
  color: white; font-size: .8rem; font-weight: 800;
  display: flex; align-items: center; justify-content: center;
  margin-top: 1px;
}
.ts-step strong { color: var(--gray-800); }
.ts-step div { font-size: .88rem; color: var(--gray-600); line-height: 1.65; }
.ts-note {
  margin: 16px 0; padding: 12px 16px; border-radius: 10px;
  background: rgba(245,158,11,.08); border-left: 3px solid var(--gold);
  font-size: .85rem; color: var(--gray-700); line-height: 1.6;
}
.ts-note--green {
  background: rgba(34,197,94,.08); border-left-color: #22c55e;
}
.ts-card__body .btn { margin-top: 12px; }
.ts-emergency { display: flex; flex-direction: column; gap: 10px; margin: 16px 0; }
.ts-emergency__item {
  display: flex; align-items: center; gap: 12px;
  padding: 10px 14px; background: var(--gray-50);
  border-radius: 8px; border: 1px solid var(--gray-200);
  font-size: .88rem; color: var(--gray-700); font-weight: 500;
}
.ts-emergency__item > span:first-child { font-size: 1.2rem; flex-shrink: 0; }

/* ===== REVEAL ===== */
.reveal {
  opacity: 0; transform: translateY(28px);
  transition: opacity .65s ease, transform .65s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ===== RESPONSIVE – MOBILE FIRST ===== */

/* ── Tablet ≤1024px ── */
@media (max-width: 1024px) {
  .promo-combos__grid { grid-template-columns: 1fr 1fr; }
  .ts-grid { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 36px; }
  .contact__grid { grid-template-columns: 1fr; }
  .process__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process__grid::before { display: none; }
}

/* ── Mobile ≤768px ── */
@media (max-width: 768px) {
  .container { padding: 0 16px; }

  /* — Topbar — */
  .topbar__inner > span:not(.topbar__phone) { display: none; }
  .topbar__inner > a.topbar__phone { text-align: center; }

  /* — Header — */
  .header__inner { padding-top: 10px; padding-bottom: 10px; gap: 10px; }
  .logo__img { height: 46px; width: 46px; }
  .logo__brand { font-size: .95rem; }
  .logo__tagline { display: none; }
  .header__cta { display: none; }
  .hamburger { display: flex; margin-left: auto; }

  /* — Mobile Nav dropdown — */
  .nav {
    display: none;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(255,255,255,.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    padding: 12px 12px 20px;
    box-shadow: 0 12px 40px rgba(0,0,0,.18);
    border-top: 2px solid var(--fire-light);
    gap: 2px; z-index: 99;
    max-height: calc(100vh - 66px);
    overflow-y: auto;
  }
  .nav.open { display: flex; }
  .nav a {
    padding: 14px 18px; width: 100%;
    border-radius: 10px; font-size: 1rem; font-weight: 600;
    border-bottom: 1px solid var(--gray-100);
  }
  .nav a:last-child { border-bottom: none; }
  .nav a:hover { background: var(--gray-100); color: var(--fire-mid); }

  /* — Nav call-to-action inside mobile menu — */
  .nav::after {
    content: '📞 Gọi ngay: 0977 092 263';
    display: block; margin-top: 12px;
    background: linear-gradient(135deg, var(--fire-mid), var(--fire-light));
    color: white; text-align: center;
    padding: 14px 18px; border-radius: 10px;
    font-weight: 700; font-size: .95rem;
    cursor: pointer;
  }

  /* — Hero — */
  .hero { min-height: clamp(580px, 100svh, 800px); }
  .hero__content { padding: 80px 0 48px; max-width: 100%; }
  .hero__badge { font-size: .78rem; padding: 5px 14px; margin-bottom: 14px; }
  .hero__subtitle { font-size: .95rem; margin-bottom: 24px; }
  .hero__actions { gap: 12px; margin-bottom: 32px; }
  .hero__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    border-radius: var(--radius);
  }
  .stat__divider { display: none; }
  .stat { padding: 14px 8px; min-width: 0; }
  .stat__num { font-size: 1.4rem; }
  .stat__label { font-size: .72rem; }

  /* — Trust bar — */
  .trust-bar__inner { padding: 16px 0; }
  .trust-item { min-width: 50%; padding: 12px 16px; }

  /* — Sections — */
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }

  /* — Services — */
  .services__grid { grid-template-columns: 1fr; gap: 18px; }
  .service-card__img { height: 200px; }

  /* — Process — */
  .process__grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .process__grid::before { display: none; }
  .process-step { padding: 0 8px; }
  .process-step__num { width: 64px; height: 64px; font-size: 1.5rem; margin-bottom: 14px; }

  /* — Promo combos — */
  .promo-combos { padding: 48px 0; }
  .promo-combos__header { margin-bottom: 28px; gap: 14px; }
  .promo-combos__grid { grid-template-columns: 1fr; gap: 16px; }
  .promo-combos__badge { margin-left: 0; }

  /* — Pricing — */
  .pricing__grid { grid-template-columns: 1fr; }
  .pricing-card--featured { transform: none; }
  .price-tabs {
    flex-wrap: nowrap; overflow-x: auto;
    justify-content: flex-start; padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .price-tabs::-webkit-scrollbar { display: none; }
  .price-tab { flex-shrink: 0; }

  /* — Troubleshoot — */
  .ts-grid { grid-template-columns: 1fr; gap: 14px; }
  .ts-card__header { padding: 16px 18px; }
  .ts-card__body { padding: 0 18px 18px; }

  /* — Why us — */
  .why-us__grid { grid-template-columns: 1fr; gap: 16px; }
  .why-card { padding: 24px 20px; }

  /* — Partners — */
  .partner-logo { width: 140px; }
  .partner-logo svg { width: 140px; height: 56px; }
  .partners__stats { padding: 20px 16px; flex-wrap: wrap; gap: 4px; }
  .pstat { padding: 8px 14px; }
  .pstat__divider { display: none; }

  /* — Testimonials — */
  .testimonials__grid { grid-template-columns: 1fr; }

  /* — Contact — */
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }

  /* — CTA section — */
  .cta-section { padding: 72px 0; }

  /* — Footer — */
  .footer { padding: 52px 0 0; }
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 28px; padding-bottom: 40px; }

  /* — Float buttons — */
  .float-cta { bottom: 70px; right: 14px; gap: 10px; }
  .float-btn { width: 50px; height: 50px; }
  .float-btn svg { width: 20px; height: 20px; }
  .back-to-top { bottom: 14px; right: 14px; width: 42px; height: 42px; }
}

/* ── Small Mobile ≤480px ── */
@media (max-width: 480px) {
  .container { padding: 0 14px; }

  /* Hero */
  .hero__content { padding: 72px 0 40px; }
  .hero__actions { flex-direction: column; gap: 10px; }
  .hero__actions .btn { justify-content: center; }
  .btn--lg { padding: 14px 26px; font-size: 1rem; }

  /* Stats – 2×2 grid */
  .hero__stats { grid-template-columns: 1fr 1fr; }
  .hero__stats > div:nth-child(5),
  .hero__stats > div:nth-child(7) { border-top: 1px solid rgba(255,255,255,.1); }
  .hero__stats > div:nth-child(1),
  .hero__stats > div:nth-child(5) { border-right: 1px solid rgba(255,255,255,.1); }
  .stat { padding: 16px 12px; }
  .stat__num { font-size: 1.5rem; }

  /* Trust bar */
  .trust-item { min-width: 100%; }
  .trust-item + .trust-item::before { display: none; }

  /* Sections */
  .section { padding: 48px 0; }
  .section-header { margin-bottom: 32px; }

  /* Process */
  .process__grid { grid-template-columns: 1fr; gap: 20px; }

  /* Promo */
  .promo-combos__header { flex-direction: column; gap: 10px; align-items: flex-start; }
  .promo-card { padding: 22px 18px; }
  .promo-card__new { font-size: 1.7rem; }

  /* Pricing */
  .price-tab { padding: 8px 14px; font-size: .82rem; }
  .price-table th, .price-table td { padding: 10px 12px; font-size: .82rem; }

  /* Why us */
  .why-card { padding: 22px 18px; }

  /* Partners stats */
  .partners__stats { flex-direction: column; align-items: center; padding: 20px; gap: 16px; }
  .pstat { padding: 4px 0; }
  .pstat__num { font-size: 1.7rem; }

  /* CTA */
  .cta-section { padding: 56px 0; }
  .cta-section__actions { flex-direction: column; align-items: center; gap: 10px; }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr; gap: 28px; }
  .footer__social { flex-wrap: wrap; }
  .footer__phone { font-size: 1.2rem; }
}

/* ── Very Small ≤380px ── */
@media (max-width: 380px) {
  html { font-size: 15px; }
  .container { padding: 0 12px; }
  .logo__img { height: 40px; width: 40px; }
  .logo__brand { font-size: .86rem; }
  .hero__content { padding: 68px 0 36px; }
  .hero__badge { font-size: .72rem; padding: 4px 11px; }
  .stat__num { font-size: 1.3rem; }
  .promo-card__new { font-size: 1.5rem; }
  .btn--full { font-size: .84rem; }
  .partner-logo { width: 120px; }
  .partner-logo svg { width: 120px; height: 50px; }
  .price-tab { padding: 7px 12px; font-size: .78rem; }
}